A load cell utilizes a plurality of strain gauges mounted upon the load cell body such that there are six independent load-strain relations. Load is determined by applying the inverse of a load-strain sensitivity matrix to a measured strain vector. The sensitivity matrix is determined by performing a multivariate regression technique on a set of known loads correlated to the resulting strains. Temperature compensation is achieved by configuring the strain gauges as co-located orthogonal pairs.
The load cell described herein was developed under Contract DE-AC04-94AL850000 between Sandia Corporation and the U.S. Department of Energy. The U.S. Government has certain rights in the invention.